Diagnostic Test

ACTIVE DTC
NOTE: Diagnose any CAN - C Communication DTCs before continuing.
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go to step 2
  No
  - Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(G31) AAT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

Fig 1: Checking AAT Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C4 TIPM harness connector.
3. Disconnect the AAT Sensor harness connector.
  NOTE: Visually inspect both the component and the TIPM connectors. Look for damaged, partially broken wires, and backed out or corroded terminals.
4. Ignition on, engine not running.
5. Measure the voltage on the (G31) AAT Signal circuit in the AAT Sensor harness connector.
  Is the voltage above 5.2 volts?
  
  Yes
  - Repair the short to voltage in the (G31) AAT Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 3
AAT SENSOR VOLTAGE ABOVE 4.6 VOLTS
1. Turn the ignition off.
2. Connect the C4 TIPM harness connectors.
3. Ignition on, engine not running.
4. With a scan tool, read the AAT voltage.
  Is the voltage above 4.6 volts?
  
  Yes
  - Go to step 4
  No
  - Go to step 7
AAT SENSOR

Fig 2: Checking AAT Signal Circuit
Courtesy of CHRYSLER LLC
1. Connect a jumper wire between the (G31) AAT Signal circuit and the (G931) AAT Return circuit in the AAT Sensor harness connector.
2. With a scan tool, read the AAT voltage.
  Is the voltage below 1.0 volt with the jumper wire installed?
  
  Yes
  - Replace the AAT Sensor.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 5
    NOTE: Remove the jumper wire before continuing.
(G31) AAT SIGNAL CIRCUIT OPEN

Fig 3: Checking AAT Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C4 TIPM harness connector.
3. Measure the resistance of the (G31) AAT Signal circuit from the AAT Sensor harness connector to the C4 TIPM harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the open in the (G31) AAT Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(G931) AAT RETURN CIRCUIT OPEN

Fig 4: Checking AAT Return Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (G931) AAT Return circuit from the AAT Sensor harness connector to the C4 TIPM harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 9
  No
  - Repair the open in the (G931) Sensor ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(G31) AAT SIGNAL CIRCUIT SHORTED TO GROUND

Fig 5: Checking AAT Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C4 TIPM harness connector.
3. Measure the resistance between ground and the (G31) AAT Signal circuit in the AAT Sensor harness connector.
  Is the resistance below 100 ohms?
  
  Yes
  - Repair the short to ground in the (G31) AAT Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 8
(G31) AAT SIGNAL SHORTED TO THE (G931) AAT RETURN CIRCUIT

Fig 6: Checking AAT Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (G31) AAT Signal circuit and the (G931) AAT Return circuit in the AAT Sensor harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the short between the (G931) AAT Return circuit and the (G31) AAT Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 9
TIPM
NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Totally Integrated Power Module in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .